Gas-burner.



110.880,690. PATBNTBD MAR.s,19oa.

J. E. NADASDY.

GAS BURNER.

APPLICATION FILED NOV. l, 1907.

tu: NoRms Pennes co., wAsulN'GroN. D` c:A

JOHN E. NADASDY, OF CHIOIAGO, ILLINOIS.

GAS-BURNER.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed November l. 1907. Serial No. 400.272.

To all whom it may concern.'

Be it known that I, JOHN E. NADASDY, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Gas-Burners, of which the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to automatic gas burners in which a shut-off valve is thermally controlled; the object of the invention being to secure simplicity and high efliciency of devices of this character, and the invention consisting in the structure hereinafter described .and which is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the burner; Fig. 2 is avertical central sectio'n of the same; Fig. 3 is a plan View; Fig. 4 is a plan section on the line 4-4 of Fig. 1; and Fig. 5 is a detail section of the cupped diaphragm securing-ring used in the device, and showing a modified form of construction.

The device comprises a cup-shaped body member 10, having at its lower end anipple 11, for attachment to a gas pipe and being hermetically closed by means of a metallic diaphragm 12, applied to its top and secured thereto by means of a clamping ring 13, having a pendent flange 14, which may be in threaded engagement with the rim 15 of the cup 10, as shown in Fig. 2. If desired the ring 13 may have a pendent flange 16, which f is simply forced upon the cup rim 15, in

which case a perfectly tight closure may be secured by slightly expanding the ring by heat before applying it to the cup.

A tubular stem 17 rises from the bottom of the cup, its duct being a continuation of the duct of the nipple 11. The upper end 18 of the stem 17 is conical or needle-shaped to serve the purpose of a valve, and lateral ports 19 lead from the duct of the stem. A tube 20 fits over and is in sliding engagement with the stem 17, its lower end reaching almost to the bottom of the cup 10 and its upper end being contracted to form a seat for the valve 18. The tube 2O projects through the diaphragm l2, and to its outer end is fitted the burner 21. A small' quantity of liquid 22 is placed within the cup 10 to seal the lower end of the tube 20, thus cutting off the gas from the chamber of the cup and preventing the escape of air therefrom.

The parts are assembled so that at normal temperatures the valve 1S closes the duct of the tube 20 communicating with the burner 21. By slightly warming the walls of the cup 10, by passing the flame of a burning match slowly past them, the air within the cup expands sufliciently to force upwardly the diaphragm 12, and with it the burner 21 and its appurtenances, thus opening the valve 1S and allowing the gas to issue from the burner tip, where it may be ignited. The heat from the gas flame will now maintain a sufficient temperature of the air within the cup to hold the valve open and permit the steady flow of gas'. Shouldthe gas flame be extinguished from any cause, the air within the cup quickly contracts and the valve is closed, cutting olf the gas from the burner. An ordinary gas key may be used, if desired, though it is unnecessary as the valve 18 may be safely depended upon to prevent the escape of gas, unless it is ignited as it issues from the burner.

I claim as my invention- 1. In a gas burner, in combination, a diaphragm-closed expansion chamber, a gas pipe entering the chamber, a burner tip carried' by the diaphragm and communicating with the gas pipe, and a valve interposed between the tip and the pipe and controlled by the diaphragm.

2. In a gas burner, in combination, a diaphragm-closed expansion chamber, a tube entering the chamber, a tube leading from the chamber, one of such tubes carrying a valve for closing the other tube and one of suchtubes being supported by the diaphragm.

3. In a gas burner, in combination, a cup, a tubular stem entering the cup, its inner end being a valve, a diaphragm covering the mouth of the cup, a burner carried by the diaphragm, a tube extending into the cup from the burner and inclosing the stem and forming a seat for the valve.

4. In a gas burner, in combination, a cup, a tubular stem entering the cup, its inner end being a valve, a dia hragm covering the mouth of the cup, a urner carried by the diaphragm, a tube extending into the cup from the burner and inclosing the stem and forming a seat for the valve, and a liquid seal for the inner end of the tube.

JOHN E. NADASDY. Witnesses:

LoUIs K. GILLsoN, E. M. KLATCHER. 

